> In cluttered UIs it helps when they show you where to navigate. They're also good in minimalist UIs, which can be just as difficult to navigate if not more s

> In cluttered UIs it helps when they show you where to navigate. They're also good in minimalist UIs, which can be just as difficult to navigate if not more so. The difficulty stemming from the such UIs typically only showing you what's related to the current task, making it difficult to know if you're in the path that progresses toward your goal (if your goal extends beyond task in view).